Chrysler 2009 Aspen Hybrid - Manual (Page 44)

CLIMATE CONTROLS
Automatic Temperature Control (ATC)
The control can be turned on by pressing the power knob.
When the control is turned on, it will be in the last mode
prior to being turned off. Pressing the power knob a
second time will turn off the control. The control can also
be turned on by pressing any button and it will display
the corresponding operation mode for that button.
Automatic Temperature Control
42 UNDERSTANDING YOUR INSTRUMENT PANEL